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Augment Express Request Without Fighting the Compiler

Add a user property to the Express request type with a module augmentation in one declaration file. After this, middleware and handlers agree on the type and you avoid the mistake that floods node_modules with errors.

5 min read
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Template Literal Types for /users/:id Routes

Turn a route pattern into a type that finds the parameter names and checks the paths you pass. After this, a typo in a route or a missing parameter is a compile error.

5 min read